Tente isto:
USE master
GO
xp_readerrorlog 0, 1, N'Server is listening on'
GO
http://www.mssqltips.com/sqlservertip/2495/identify-sql-server-tcp-ip-port-being-used/
USE master
GO
xp_readerrorlog 0, 1, N'Server is listening on'
GO
